In a given environment, dark-colored moths are selected because they stand out to predators against the predominantly light-colored foliage. this causes a shift in the overall genetic makeup of the moth population away from the dark-colored phenotype. this is an example of what kind of selection?
a) artificial
b) directional
c) disruptive
d) stabilized

What is one benefit of a nonrenewable resource, such as natural gas? a. generate large amounts of electricity b. less expensive overtime c. produces pollution d. will run out eventually

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

Identify the missing parts of the carbon cycle